The film explores the harrowing tale of a serial killer who evaded capture due to repeated police oversights. Stephen Port, over a span of fifteen months, drugged and murdered four young gay men in East London, disposing of their bodies in close proximity to one another. The narrative unfolds from the perspective of the victims’ families, highlighting the police’s inadequate investigations into each death. The authorities’ preconceived notions that these men had succumbed to self-administered overdoses of chem-sex drugs enabled Port to continue his spree of assault and murder.